Weft-spool changer for weaving-looms



A. G. KOECHLIN.

WEFT SPOOL CHANGER FOR. WEAVING LOOMS.

APPLICATION FILED MAY I. 1919.

UNITED A 1" narrar orrice.

ALBERT GERG DECHLIN, El? BASEL, S'WITZERLAND.

VJEFT-SPOOL GEANGLER EUR VJELiTING-LOQMS,

Application filed May l,

T0 all 'whom t may concern.'

lle it known that l, ALBERT Girone KonoH- LIN, a citizen of the Swiss Republic,and resident oii Basel, Switzerland, have invent` ed new and useful improvements in lil/lett- Spool Changers tor Weaving -Looms, ot which the following is a full, clear, and exact specification.

ln known welt spool changers for weaving looms the loaded spool is generally introduced into the shuttle by means oi a stationary pusher whichv is independent ot the lay and is depressed for thrusting the spool into the shuttle ready to receive it, betere the lay arrives at its forward dead-point.

rllhe present invention 4relates to a changer in which the pusher is actuated 'to introduce the l-'resh spool into the shuttle not only, as hitherto, before the dead-point position ot' the lay, but also at any later position ot the lay up to the moment when the throw of the shuttle begins. For this purpose the pusher, which in known manner shares the movement ofthe lay, remains during its travel in cooperative relationship with an arm adapted to depress it for` introducing'the spool into the shuttle; the mechanism of known kind tor operating this arm, independently ot the driving mechanism of the lay, when the wett fails is so arranged that the depression of the pusher may occur in the desired manner.

Advantageously the arm is operated for,

depressing the pusher by means 'ot a revolving `cam disk brought into cooperative relationship with the arm by an automatic coupling, the coupling movement being due to a weft stop motion.

The accompanying drawings show two constructions in accordance with the invention:

Figure l is a vertical section through a loom fitted with oneV or' the constructions;

Fig. 2 is an enlarged side elevation oll the wett stop motion;

Fig. 3 is a corresponding plan view;

Fig. l shows by vertical section the aforesaid coupling with the cooperating parts;

Fig. 5 shows in 'front view the wett spool pusher mounted on the lay;

Y Fig. 6 illustrates diagrammatically the second construction.

As is usual'in wett spool changers, there is on one side ot the loom a meclianism for putting the changer in action, this mechanism being dependent upon a wett stop mo- Specification of Letters Patent.

Patented J uly 6, 1920.

tion comprising a forkand an oscillating lever. y ln tliepresent instance (Figs. L5) there is a slide bed l on which are adapted to slide a rod 2 ot rectangular section and a rack. 'lhe former carries a bracket fl: on which are pivoted the weft eeler fork 5 and the pawl which moves the rack 3 (Figs. 2 and lll/hen the weft thread tails and the fork 5 has in consequence been engaged in known manner by the oscillating lever 7 (Fig. l), the outward swing ot the latterpushes the rod 2 against the action of a spring (not shown) and through this rod a lever 8 mounted on the usual shaft 13 which entends across the loom tor operating the changer.` This movement of lever 8, therefore, puts in action the changer on the other side or' the loom. At the same time the pawl t3 moves the rack 3 one step outward against the action of its spring 3a.

Behind the pawl 6 a detent 9, turning on a stationary pivot lOgg'engages the rack 3, so that when the lever 7 swings inward again the pawl (i rides over the teeth of the rack while the latter remains at rest.

Both pawl 6 and detent 9 have downwardly extended tails, 6 and 9a respectively, with which cooperates a tappet l0 oscillating with the lever 7. ln normal `working of the loom this tappet each time it swings outward with the lever presses on the tails (3a and 9a and raises both pawl and detent from engagement with the rack 3, so that rod 2 and this rack remain Vin or assume normal position. Thus when the weft thread fails the pawl 6, s already stated, moves rack 3 outward during the outward swing of lever 7, while during the next inward swing of the latter the rack remains held by dctent 9 in the new position. It the wei't thread fails only at one throw the next outward movement ot the lever 7 raises both pawl G and detent Qin the aforesaid manner and rod 2 and rack 3 return to normal position. 0n the other hand, it the spool changer does not operate at'once and the weit thread fails at the next throw, the pawl 6 will advance the rack a second step outward, whereby the tail o'd1 of the pawl is withdrawn beyond the range oit movement or" tappet l0, so that now a projection 3b on the tail of rack 3 can engage the usual spring lever l2 oi the weft stop motion, and the loom is stopped. v

,"tccording to the pitch ot the teeth ot the rack 3 and the position of the latter'rela- `i3 of a clutch 19.011 the pin 2l.

tappet l0 allows the detent 9 to fall cor Yrectly forV locking the rack. BeforeV the' loom is again started after such a stoppagep the weaver presses on the tails 6a and 9ZL in orderl to raise the pawl and detent and thus to allow-the parts 2 and 3 to return to normal position. V

'll he turning movement of shaft 13, caused by the thrust of rod 2, is transformed on the other side of the loom, bymeans of an arm ist on the shaft, into rectilinear movement of a sliding rod le carrying rack teeth which-engage a pinion A crank pin on thelatter isconnected by'arm 16 with one end Vof a lever ll', the other end ofwhich .carries ay forlr engaging theslidingsleeve The sleeve 1S carries an arm 22 on which isfadjustably mounted a roller 23 bearing against a rotating cam dislr'2e but normally outof the path of the cam'3l thereof. 'lhejcoimter- Vpart 2O of the clutch 19 has an arm 25 which extends v over an adjustable cross Vhead 26 (F ig. 5') onl the spool-pusher 27. The latter moves to and fro in space together with the lay 28 in which it is mounted to slide up and down, being normally held in its highest position by springs 30. lt can move with l the lay unhindered by the arm 25.' When,

however, the turning of shaft 13 determines the engagement ofthe coupling 19, the roller 23 comes into the path of the cam 3l of the cam disk 24and is raised so as to depress the arm 25 and thereforethepusher 27 which .eXpels from the spool carrier a loaded spool Vinto the shuttle, theV latter having inthe meantime arrivedbeneath the pusher. vlhe cam disk 24; andthe parts coperating with it are so arranged thatthe introductionof a new spooliinto the shuttle occursl during a period of `time within which the driving shaft of the lay `(crank shaft) performs a quarter revolution, and that the depression of the pusher begins about the moment when the lay has arrived at its forward dead point and must be ended when, the dead point position having been passed, thel shuttle throwv begins. This condition is here quite possible since the4 pusher always shares the movement of the'V lay. The moment when the pusher actsmay be Vadjusted within certain limits by adjustingthe cam disk 245so that the feedof a newweft spool may be made toy occur before the forward dead point or after Jit up to the beginning ofthe shuttle throw. Y By means of this construction the shuttle may have the same speed Yas inthe usual loose reed loom. Y Y

llVhereas, therefore,in the hitherto known automatic looms, which must always be iXed point. Thus a gentle, smooth stroke for the throw of the shuttle can be retained. Y l'nstead of the coupling.mechanism (lescribed the actuation of the spool; pusher may be brought about by moving the cam disk V2st so as to bring it into operative'relationship with arm 25.

Other modes of actuating the spool pusher are available; for instance a treadle mecha- Vnism may be used. A construction'of this kind is sho-wn in Fig. 6. llore the spool pusher 27 is carried by a slide rod32 which is guided'on thelay 281a11d is held normally in its highest position by springs 35. i

A forked treadle arm 33 engages the lower end of the rod-32 andis subject to the revolving camV disk 24 which at the required moment is movedinto such relation to the treadle arm that yit operates the latter to kmove the pusher'downward. Y

"JlhatlV claim is.: Y l. ln an automatic weft replenishing loom,

an oscillating lay,V aV shuttle arrangement, a

pusher for introducing -a full weft spool into. the empty shuttle, said pusher being y movably mounted on the lay so astobe Capable of bei-ng lowered thereon, an actuatl ing arm for the pusher, arranged in coperative relationship therewith, an independrent device for automatically operating the said actuating arm, weft failure detecting means to set said operating device into operation when the weft fails, said operating device having cooperating means for determining the operation for said actuating arm, substantially as and for the purpose -fdescribed. 1

2. ln an automatic weft replenishing loom, an oscillating lay, a shuttle. arrangement, a pusher for `introducingfa full weft, spool into the empty shuttle, said pusher being movably mounted on the lay and soas to be capable of being lowered. thereon, an actuating arm for the pusher, karranged in permanent sliding contact therewith, an independent device for automatically operating the said actuating arm, weft failure `detecting means to set said! operating deviceA into operation Vwhenthe weft fails, said operating device having cooperating `meansfor determining the operation forsaid actuating arm, substantially as and for therpurpose described. v .Y f

3. ln an automatic weft replenishing loom, an oscillating lay, a shuttle arrangement, a

pusher for introducing a full weft spool into the empty shuttle, Vsaid pusher being mevably mounted on the lay se as to be ca pable of beinglowered thereon, an actuating,l arm for the pusher, arranged in coperative relationship therewith, an independent rotary cam disk for operatingl the said actuating arm, an intermediate arm arranged for cooperating with said cam disk, a coupling between said intermediate arm and said actuating arm, and a weft stop motion connected to said coupling to close the same for a weft spool change operation when the wett fails, substantially as and tor the purpose described.

4. In an automatic weft replenishing loom, an oscillating lay, a shuttle arrangement, a pusher for introducing a full weft spool into the empty shuttle, said pusher being movably mounted on the lay and so as to be capable of being lowered thereon, an actuating arm for the pusher, arranged in cop erative relationship therewith, an independent rotary cam disk for operating the said actuating arm, a coupling, one member of which carries said actuating` arm, an intermediate arni carried by the other coupling member and arranged to be brought into ceperative relationship with said cam disk when the coupling is closed, and a weft stop motion connected to said coupling to close the saine for a weft spool change operation when the weft fails, substantially as and for the purpose described.

In witness whereof l have hereunto signed my name this 12th day of April, 1919, in the presence of two subscribing witnesses.

ALBERT GEORG KOECHLIN.

Witnesses SCOTT TAGGART, AMAND BRAUN. 

